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1W RF Data Module Serial to wireless RS232, RS485 from Lensen--Wireless Communication on Tindie
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Wireless serial RS232 adapter - Industrial
PowMr Wifi Module - WIFI-VM – PowMr
Serial wireless Wi-Fi Adapter with RS232, RS485 and RS422 interfaces
RS232 Serial Wifi Modem for Vintage Computers V4 from The Old Net on Tindie